Carbon dioxide test. Test tube of limewater with carbon dioxide gas being bubbled through. The limewater, a solution of calcium hydroxide in water, is turning milky. This is used as a test for the presence of carbon dioxide. The reaction between limewater and carbon dioxide produces calcium carbonate as a white solid (precipitate). The equation for the reaction is: CO2 + Ca(OH)2 ---> CaCO3 + H2O.

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TOP10163887

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達志影像

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RM

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